1 /* 2 * Copyright 2014 Freescale Semiconductor, Inc. 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <i2c.h> 9 #include <hwconfig.h> 10 #include <asm/mmu.h> 11 #include <fsl_ddr_sdram.h> 12 #include <fsl_ddr_dimm_params.h> 13 #include <asm/fsl_law.h> 14 #include <asm/mpc85xx_gpio.h> 15 16 DECLARE_GLOBAL_DATA_PTR; 17 18 struct board_specific_parameters { 19 u32 n_ranks; 20 u32 datarate_mhz_high; 21 u32 rank_gb; 22 u32 clk_adjust; 23 u32 wrlvl_start; 24 u32 wrlvl_ctl_2; 25 u32 wrlvl_ctl_3; 26 }; 27 28 /* 29 * datarate_mhz_high values need to be in ascending order 30 */ 31 static const struct board_specific_parameters udimm0[] = { 32 /* 33 * memory controller 0 34 * num| hi| rank| clk| wrlvl | wrlvl | wrlvl | 35 * ranks| mhz| GB |adjst| start | ctl2 | ctl3 | 36 */ 37 {2, 833, 0, 8, 6, 0x06060607, 0x08080807,}, 38 {2, 1350, 0, 8, 7, 0x0708080A, 0x0A0B0C09,}, 39 {2, 1666, 0, 8, 7, 0x0808090B, 0x0C0D0E0A,}, 40 {1, 833, 0, 8, 6, 0x06060607, 0x08080807,}, 41 {1, 1350, 0, 8, 7, 0x0708080A, 0x0A0B0C09,}, 42 {1, 1666, 0, 8, 7, 0x0808090B, 0x0C0D0E0A,}, 43 {} 44 }; 45 46 static const struct board_specific_parameters *udimms[] = { 47 udimm0, 48 }; 49 50 void fsl_ddr_board_options(memctl_options_t *popts, 51 dimm_params_t *pdimm, 52 unsigned int ctrl_num) 53 { 54 const struct board_specific_parameters *pbsp, *pbsp_highest = NULL; 55 ulong ddr_freq; 56 struct cpu_type *cpu = gd->arch.cpu; 57 58 if (ctrl_num > 1) { 59 printf("Not supported controller number %d\n", ctrl_num); 60 return; 61 } 62 if (!pdimm->n_ranks) 63 return; 64 65 pbsp = udimms[0]; 66 67 /* Get clk_adjust according to the board ddr freqency and n_banks 68 * specified in board_specific_parameters table. 69 */ 70 ddr_freq = get_ddr_freq(0) / 1000000; 71 while (pbsp->datarate_mhz_high) { 72 if (pbsp->n_ranks == pdimm->n_ranks && 73 (pdimm->rank_density >> 30) >= pbsp->rank_gb) { 74 if (ddr_freq <= pbsp->datarate_mhz_high) { 75 popts->clk_adjust = pbsp->clk_adjust; 76 popts->wrlvl_start = pbsp->wrlvl_start; 77 popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2; 78 popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3; 79 goto found; 80 } 81 pbsp_highest = pbsp; 82 } 83 pbsp++; 84 } 85 86 if (pbsp_highest) { 87 printf("Error: board specific timing not found\n"); 88 printf("for data rate %lu MT/s\n", ddr_freq); 89 printf("Trying to use the highest speed (%u) parameters\n", 90 pbsp_highest->datarate_mhz_high); 91 popts->clk_adjust = pbsp_highest->clk_adjust; 92 popts->wrlvl_start = pbsp_highest->wrlvl_start; 93 popts->wrlvl_ctl_2 = pbsp->wrlvl_ctl_2; 94 popts->wrlvl_ctl_3 = pbsp->wrlvl_ctl_3; 95 } else { 96 panic("DIMM is not supported by this board"); 97 } 98 found: 99 debug("Found timing match: n_ranks %d, data rate %d, rank_gb %d\n", 100 pbsp->n_ranks, pbsp->datarate_mhz_high, pbsp->rank_gb); 101 debug("\tclk_adjust %d, wrlvl_start %d, wrlvl_ctrl_2 0x%x, ", 102 pbsp->clk_adjust, pbsp->wrlvl_start, pbsp->wrlvl_ctl_2); 103 debug("wrlvl_ctrl_3 0x%x\n", pbsp->wrlvl_ctl_3); 104 105 /* 106 * Factors to consider for half-strength driver enable: 107 * - number of DIMMs installed 108 */ 109 popts->half_strength_driver_enable = 0; 110 /* 111 * Write leveling override 112 */ 113 popts->wrlvl_override = 1; 114 popts->wrlvl_sample = 0xf; 115 116 /* 117 * rtt and rtt_wr override 118 */ 119 popts->rtt_override = 0; 120 121 /* Enable ZQ calibration */ 122 popts->zq_en = 1; 123 124 /* DHC_EN =1, ODT = 75 Ohm */ 125 popts->ddr_cdr1 = DDR_CDR1_DHC_EN | DDR_CDR1_ODT(DDR_CDR_ODT_OFF); 126 popts->ddr_cdr2 = DDR_CDR2_ODT(DDR_CDR_ODT_OFF); 127 128 /* T1023 supports max DDR bus 32bit width, T1024 supports DDR 64bit, 129 * force DDR bus width to 32bit for T1023 130 */ 131 if (cpu->soc_ver == SVR_T1023) 132 popts->data_bus_width = DDR_DATA_BUS_WIDTH_32; 133 134 #ifdef CONFIG_FORCE_DDR_DATA_BUS_WIDTH_32 135 /* for DDR bus 32bit test on T1024 */ 136 popts->data_bus_width = DDR_DATA_BUS_WIDTH_32; 137 #endif 138 139 #ifdef CONFIG_TARGET_T1023RDB 140 popts->wrlvl_ctl_2 = 0x07070606; 141 popts->half_strength_driver_enable = 1; 142 popts->cpo_sample = 0x43; 143 #elif defined(CONFIG_TARGET_T1024RDB) 144 /* optimize cpo for erratum A-009942 */ 145 popts->cpo_sample = 0x52; 146 #endif 147 } 148 149 #ifdef CONFIG_SYS_DDR_RAW_TIMING 150 /* 2GB discrete DDR4 MT40A512M8HX on T1023RDB */ 151 dimm_params_t ddr_raw_timing = { 152 .n_ranks = 1, 153 .rank_density = 0x80000000, 154 .capacity = 0x80000000, 155 .primary_sdram_width = 32, 156 .ec_sdram_width = 8, 157 .registered_dimm = 0, 158 .mirrored_dimm = 0, 159 .n_row_addr = 15, 160 .n_col_addr = 10, 161 .bank_addr_bits = 2, 162 .bank_group_bits = 2, 163 .edc_config = 0, 164 .burst_lengths_bitmask = 0x0c, 165 .tckmin_x_ps = 938, 166 .tckmax_ps = 1500, 167 .caslat_x = 0x000DFA00, 168 .taa_ps = 13500, 169 .trcd_ps = 13500, 170 .trp_ps = 13500, 171 .tras_ps = 33000, 172 .trc_ps = 46500, 173 .trfc1_ps = 260000, 174 .trfc2_ps = 160000, 175 .trfc4_ps = 110000, 176 .tfaw_ps = 25000, 177 .trrds_ps = 3700, 178 .trrdl_ps = 5300, 179 .tccdl_ps = 5355, 180 .refresh_rate_ps = 7800000, 181 .dq_mapping[0] = 0x0, 182 .dq_mapping[1] = 0x0, 183 .dq_mapping[2] = 0x0, 184 .dq_mapping[3] = 0x0, 185 .dq_mapping[4] = 0x0, 186 .dq_mapping[5] = 0x0, 187 .dq_mapping[6] = 0x0, 188 .dq_mapping[7] = 0x0, 189 .dq_mapping[8] = 0x0, 190 .dq_mapping[9] = 0x0, 191 .dq_mapping[10] = 0x0, 192 .dq_mapping[11] = 0x0, 193 .dq_mapping[12] = 0x0, 194 .dq_mapping[13] = 0x0, 195 .dq_mapping[14] = 0x0, 196 .dq_mapping[15] = 0x0, 197 .dq_mapping[16] = 0x0, 198 .dq_mapping[17] = 0x0, 199 .dq_mapping_ors = 1, 200 }; 201 202 int fsl_ddr_get_dimm_params(dimm_params_t *pdimm, 203 unsigned int controller_number, 204 unsigned int dimm_number) 205 { 206 const char dimm_model[] = "Fixed DDR4 on board"; 207 208 if (((controller_number == 0) && (dimm_number == 0)) || 209 ((controller_number == 1) && (dimm_number == 0))) { 210 memcpy(pdimm, &ddr_raw_timing, sizeof(dimm_params_t)); 211 memset(pdimm->mpart, 0, sizeof(pdimm->mpart)); 212 memcpy(pdimm->mpart, dimm_model, sizeof(dimm_model) - 1); 213 } 214 215 return 0; 216 } 217 #endif 218 219 #if defined(CONFIG_DEEP_SLEEP) 220 void board_mem_sleep_setup(void) 221 { 222 void __iomem *cpld_base = (void *)CONFIG_SYS_CPLD_BASE; 223 224 /* does not provide HW signals for power management */ 225 clrbits_8(cpld_base + 0x17, 0x40); 226 /* Disable MCKE isolation */ 227 gpio_set_value(2, 0); 228 udelay(1); 229 } 230 #endif 231 232 int dram_init(void) 233 { 234 phys_size_t dram_size; 235 236 #if defined(CONFIG_SPL_BUILD) || !defined(CONFIG_RAMBOOT_PBL) 237 #ifndef CONFIG_SYS_DDR_RAW_TIMING 238 puts("Initializing....using SPD\n"); 239 #endif 240 dram_size = fsl_ddr_sdram(); 241 #else 242 /* DDR has been initialised by first stage boot loader */ 243 dram_size = fsl_ddr_sdram_size(); 244 #endif 245 dram_size = setup_ddr_tlbs(dram_size / 0x100000); 246 dram_size *= 0x100000; 247 248 #if defined(CONFIG_DEEP_SLEEP) && !defined(CONFIG_SPL_BUILD) 249 fsl_dp_resume(); 250 #endif 251 252 gd->ram_size = dram_size; 253 254 return 0; 255 } 256